Events

Crossovers, catastrophes, reorderings

Major events that reshape the line, from 9-issue sagas to 40-issue line-wide crossovers.

1980s

Dark Phoenix Saga 1980 · 10 issues

Jean Grey's transformation into the all-powerful Dark Phoenix threatens the entire universe, forcing the X-Men to confront one of their own. After consuming a star and destroying a populated planet, the Shi'ar Empire demands Jean's death, leading to a trial by combat on the Blue Area of the Moon that ends in devastating sacrifice.

Days of Future Past 1981 · 2 issues

In a dystopian future where Sentinels have conquered North America and most mutants are dead or imprisoned, an adult Kate Pryde sends her consciousness back in time to her younger self to prevent the assassination of Senator Robert Kelly. This two-issue storyline established the X-Men's most iconic alternate future and raised the stakes of the mutant-human conflict.

Mutant Massacre 1986 · 8 issues

The Marauders, led by Mr. Sinister, slaughter the Morlocks in the tunnels beneath New York City. Multiple X-teams are drawn into the conflict with devastating consequences. Angel's wings are destroyed, Colossus is critically injured, and the X-Men and X-Factor clash before discovering they're on the same side.

Fall of the Mutants 1988 · 9 issues

Three separate but simultaneous storylines reshape the X-Men landscape. In Dallas, the X-Men sacrifice their lives to stop the Adversary and are secretly resurrected by Roma. In New York, X-Factor battles Apocalypse and his Horsemen, including the transformed Angel as Death. The New Mutants face their own deadly threat as the Bird-Boy storyline reaches its tragic conclusion.

Inferno 1989 · 14 issues

Madelyne Pryor is revealed as a clone of Jean Grey created by Mr. Sinister, and she transforms into the Goblin Queen, opening a demonic portal over New York City. As demons overrun Manhattan and inanimate objects come to life, the X-Men and X-Factor must confront Sinister's manipulations, Illyana Rasputin's ties to Limbo, and the truth about Madelyne's origins. The event resolves long-simmering plotlines and permanently alters the X-Men's status quo.

1990s

X-Tinction Agenda 1990 · 9 issues

The island nation of Genosha kidnaps members of the X-Men and New Mutants to enslave them using the mutate bonding process. The combined forces of the X-Men, X-Factor, and New Mutants launch a rescue mission that topples the Genoshan government. Cameron Hodge, now a monstrous cyborg, serves as the primary antagonist, and Havok is brainwashed into serving Genosha as a magistrate.

Muir Island Saga 1991 · 5 issues

Chris Claremont's final X-Men story. The Shadow King possesses the inhabitants of Muir Island, turning it into a psychic fortress and pitting the X-Men against X-Factor in a mind-controlled battle. The two teams must overcome the Shadow King's influence and unite to defeat him. The event ends Claremont's legendary 16-year run and reunites the original X-Factor members with the X-Men roster.

X-Cutioner's Song 1992 · 13 issues

When Cable appears to assassinate Professor X at a mutant rights rally, the X-Men and X-Factor hunt him down, only to discover that the true culprit is Stryfe, Cable's clone from the future. As Xavier lies dying from a techno-organic virus, the teams must confront Stryfe, Apocalypse, and the dark legacy of the Summers bloodline. The event deepens the mystery of Cable's origins and introduces the Legacy Virus that will plague mutantkind for years.

Bloodties 1993 · 2 issues

In the aftermath of Fatal Attractions, Fabian Cortez seizes control of Genosha and kidnaps Luna — the daughter of Quicksilver and Crystal — to use as leverage against the Avengers and X-Men. Both teams converge on the war-torn island nation for a bloody confrontation. A smaller-scale crossover that explores the political fallout of Magneto's defeat and the Genoshan civil war.

Fatal Attractions 1993 · 6 issues

Magneto returns with a vengeance, and the X-Men are forced to confront him on his orbital base Avalon. The event culminates in one of the most iconic moments in X-Men history: Magneto rips the adamantium from Wolverine's skeleton, and a furious Xavier retaliates by psychically wiping Magneto's mind clean. The consequences reshape both characters for years to come.

Phalanx Covenant 1994 · 9 issues

The Phalanx — a collective of humans merged with Technarchy alien technology — infiltrate the X-Men's ranks by impersonating team members, then target the next generation of young mutants. Three interlocking storylines ("Generation Next," "Life Signs," and "Final Sanction") follow different teams racing to stop the Phalanx from assimilating mutantkind. The event directly launches Generation X and introduces several key characters.

Age of Apocalypse 1995 · 42 issues

When Legion travels back in time to kill Magneto but accidentally murders Professor X instead, reality is rewritten into a world where Apocalypse conquered North America unchallenged. For four months every X-book was replaced by an alternate-reality counterpart. Magneto leads the X-Men in Xavier's memory, fighting to restore the original timeline before the Human High Council launches a nuclear strike to stop Apocalypse.

Legion Quest 1995 · 6 issues

David Haller — Legion, the omega-level son of Charles Xavier — travels back in time to kill Magneto before he can become a threat, believing this will fulfill his father's dream. The X-Men pursue him into the past but arrive too late: Legion accidentally kills Xavier instead, creating a paradox that shatters reality and gives birth to the Age of Apocalypse. The prologue to one of the greatest X-Men events ever told.

Onslaught 1996 · 31 issues

When Professor Xavier mind-wiped Magneto after he ripped the adamantium from Wolverine's skeleton, a piece of Magneto's dark psyche merged with Xavier's own suppressed negative emotions to create Onslaught — a psionic entity of near-limitless power. Onslaught seizes control of Xavier's body, kidnaps Franklin Richards and X-Man (Nate Grey), and launches an assault on New York City. The X-Men, Avengers, and Fantastic Four unite to stop him, but the non-mutant heroes must sacrifice themselves by walking into Onslaught's energy form to weaken him enough for the X-Men to destroy. The heroes are presumed dead, secretly shunted into a pocket universe (Heroes Reborn), and anti-mutant sentiment reaches a new peak.

Operation: Zero Tolerance 1997 · 23 issues

Bastion, a human-Sentinel hybrid, receives government authorization to dismantle the X-Men and launches Operation: Zero Tolerance, deploying Prime Sentinels — ordinary humans transformed into sleeper-agent killing machines — against mutants worldwide. With the senior X-Men captured, a skeleton crew of unlikely heroes must survive and expose Bastion's program before it's too late.

The Twelve 1999 · 8 issues

An ancient prophecy names twelve mutants whose combined power Apocalypse needs to achieve ultimate ascension. Apocalypse captures the Twelve — including Cyclops, Xavier, Magneto, and others — and uses their energy to merge himself with the body of Nate Grey. Cyclops sacrifices himself to stop the process, becoming merged with Apocalypse instead. A sprawling late-90s epic that fundamentally changes Cyclops's trajectory.

2000s

Eve of Destruction 2001 · 4 issues

Magneto launches a final assault on Genosha, establishing a mutant nation by force. With most of the X-Men captured, Jean Grey hastily assembles a ragtag team of volunteers — including former villains and civilians — for a desperate rescue mission. The last traditional X-Men story before Grant Morrison's revolutionary New X-Men relaunch rewrites the rules.

Decimation 2005 · 10 issues

In the aftermath of House of M, the mutant population has been reduced from millions to just 198. The surviving mutants are corralled onto the Xavier Institute grounds under government "protection" that feels more like internment. Decimation explores the immediate fallout of "No more mutants" — the grief, the politics, and the desperate scramble for survival in a world that finally got its wish.

House of M 2005 · 8 issues

When the Avengers and X-Men debate what to do about an increasingly unstable Scarlet Witch, Wanda Maximoff reshapes reality into a world where mutants are the dominant species and Magneto rules as sovereign. As the heroes slowly remember the real world, Wanda is confronted — and utters the three words that change the Marvel Universe forever: "No more mutants." Decimation reduces the global mutant population from millions to 198.

X-Men: Deadly Genesis 2006 · 6 issues

Ed Brubaker reveals Xavier's darkest secret: before sending the All-New X-Men to rescue the originals on Krakoa, he sent another team — Vulcan, Darwin, Petra, and Sway — who were killed in the attempt. Xavier erased all memory of their existence. Now Vulcan, the third Summers brother, has returned from apparent death with omega-level power and a burning desire for revenge. A retcon that permanently tarnishes Xavier's legacy and launches the Vulcan saga.

Messiah CompleX 2007 · 13 issues

The first new mutant birth since the Scarlet Witch's Decimation triggers a three-way war for the child's fate. The X-Men, Mr. Sinister's Marauders, and the Purifiers all converge on the Alaskan town of Cooperstown, where the baby was born — only to find it already destroyed. As the teams race to locate the child, allegiances shift: Mystique and Gambit serve Sinister, Predator X hunts mutant prey, and Cable emerges with the baby. In the end, Cable takes the child into the future to protect her, Professor Xavier is shot by Bishop (who believes the child will destroy the future), and Cyclops disbands the X-Men. The first chapter of the Messiah Trilogy.

Messiah War 2009 · 12 issues

The second chapter of the Messiah Trilogy. Cyclops sends X-Force into the future to find Cable and the mutant messiah, now a young girl named Hope. They arrive in a dystopian timeline where Stryfe has established himself as a tyrant and Bishop — who believes Hope will destroy the future — has allied with him. X-Force and Cable must fight their way through Stryfe's forces, confront Apocalypse (weakened and near death), and escape Bishop's relentless pursuit. The event deepens Hope's importance and sets up her eventual return to the present in Second Coming.

Necrosha 2009 · 13 issues

Selene, the Black Queen, enacts a plan millennia in the making — using a mystical virus to resurrect millions of dead mutants as a techno-organic undead army, all to fuel her ascension to godhood on the cursed island of Genosha. X-Force leads the charge against a relentless tide of resurrected allies and enemies alike. A dark, horror-tinged event that forces the X-Men to fight their own dead.

Utopia 2009 · 4 issues

Anti-mutant riots erupt in San Francisco after Proposition X threatens to regulate mutant breeding, and Norman Osborn seizes the opportunity to create his own "Dark X-Men." Cyclops counters by raising Asteroid M from the ocean floor, establishing the island nation of Utopia as a sovereign mutant homeland off the coast of San Francisco. A turning point that transforms the X-Men from a school into a nation.

2010s

Second Coming 2010 · 22 issues

The final chapter of the Messiah Trilogy. Cable and Hope Summers return to the present, triggering Bastion's endgame: a massive anti-mutant operation using the combined forces of the Purifiers, the Sapien League, and Nimrod Sentinels from the future. Bastion traps the X-Men on Utopia inside an impenetrable energy dome and opens a portal to a future timeline, sending endless waves of Nimrod Sentinels to annihilate them. Nightcrawler is killed saving Hope from Bastion. Cable sacrifices himself to close the time portal. When Hope's power finally manifests, she destroys Bastion and sparks new mutant activations worldwide — Decimation is reversed. The Messiah Trilogy ends with the most hard-won victory in X-Men history.

Age of X 2011 · 6 issues

The X-Men wake up in a reality where mutants are under constant siege, huddled inside Fortress X as the last survivors of a genocidal human campaign. No one remembers the real world — except Legacy (Rogue), who begins to uncover the truth: this reality was created by Legion's fractured psyche. A tightly constructed alternate-reality story that explores what the X-Men would become if they had nothing left to lose.

Schism 2011 · 12 issues

The X-Men fracture. When the new Black King of the Hellfire Club — a twelve-year-old sociopath named Kade Kilgore — engineers an international anti-mutant arms race and launches a massive Sentinel attack on Utopia, Cyclops and Wolverine's simmering disagreements erupt into open conflict. Cyclops orders the teenage mutants to fight; Wolverine refuses to let children be soldiers. Their argument escalates into a brutal physical confrontation on the beach of Utopia as the Sentinel bears down. In the aftermath, Wolverine takes half the X-Men back to Westchester to reopen the school (renamed the Jean Grey School for Higher Learning), while Cyclops maintains his militant Extinction Team on Utopia. The X-Men are split in two.

Avengers vs. X-Men 2012 · 51 issues

The Phoenix Force returns to Earth, heading for Hope Summers. Captain America demands the X-Men hand her over for containment; Cyclops refuses, believing the Phoenix will restart the mutant race. War erupts between the two teams. When Iron Man attempts to destroy the Phoenix in orbit, he accidentally splits it among five X-Men — Cyclops, Emma Frost, Namor, Colossus, and Magik — who become the Phoenix Five and begin remaking the world into a utopia. But the Phoenix's power corrupts them one by one. Namor attacks Wakanda. Colossus and Magik turn on each other. Finally, a Dark Phoenix-possessed Cyclops kills Professor Xavier. Hope and the Scarlet Witch together channel the Phoenix Force to declare "No more Phoenix," dispersing it into new mutant activations worldwide — reversing Decimation. Cyclops is imprisoned. The Avengers form a unity squad. The mutant race is reborn, but at a devastating cost.

Battle of the Atom 2013 · 8 issues

When the time-displaced original X-Men refuse to return to their era, a team of future X-Men arrives to force them back — but their motives aren't what they seem. Multiple factions of present and future X-Men clash over the timeline, free will, and the right to choose your own destiny. A sprawling anniversary crossover that pits X-Men against X-Men across three generations.

AXIS 2014 · 9 issues

A Red Skull empowered by Professor Xavier's stolen brain unleashes a wave of psychic hatred across the world, and the Avengers and X-Men must unite to stop him. When a desperate spell inverts the moral alignments of everyone present, heroes become villains and villains become heroes. The inversion creates chaos across the Marvel Universe and has lasting consequences — most notably a permanently "inverted" Havok and Sabretooth.

Age of X-Man 2019 · 31 issues

In the wake of the Disassembled storyline, Nate Grey reshapes reality into a utopia where mutants are the dominant species — but love, family, and personal attachments are forbidden. The X-Men are scattered across this false paradise, living manufactured lives while cracks in the illusion slowly reveal the dystopian truth underneath. A thematic prelude to the Krakoan era that asks what paradise costs when it demands you give up what makes you human.

HoX / PoX 2019 · 12 issues

Jonathan Hickman's twin miniseries that relaunched the entire X-Men line and established the mutant nation of Krakoa. Told across two interlocking series with a complex non-linear structure, HoX/PoX redefines mutant history across four timelines — revealing that Moira MacTaggert has been secretly guiding Xavier's dream through multiple lives, that mutants have always been destined to lose, and that Krakoa represents their last, best chance at survival. The series ends with every mutant on Earth united under one banner for the first time, backed by resurrection protocols that conquer death itself.

2020s

X of Swords 2020 · 23 issues

The first major crossover of the Krakoan era, X of Swords pits ten mutant champions of Krakoa against ten swordbearers of Arakko in a tournament ordained by Saturnyne in Otherworld. When Apocalypse discovers that Arakko — the lost half of Krakoa, torn away millennia ago — has been conquered by demonic forces, the X-Men must gather ten legendary blades to answer the challenge. But the contest is not what anyone expects, and the consequences reshape the mutant world as Arakko returns and Apocalypse makes a devastating sacrifice.

Inferno (2021) 2021 · 4 issues

Jonathan Hickman's final Krakoan story brings the simmering tensions of the Quiet Council to a boil. Mystique finally gets her revenge for being denied Destiny's resurrection, Moira MacTaggert's true nature is exposed to the Council, and the foundation of everything the X-Men built on Krakoa begins to crack. A masterful capstone to Hickman's run that redefines the political landscape of the mutant nation.

A.X.E.: Judgment Day 2022 · 10 issues

When the Eternals discover that Krakoa's resurrection protocols violate the Celestial principles they were created to uphold, they launch a devastating assault on the mutant nation. The conflict awakens the Progenitor, a dormant Celestial who begins judging every living being on Earth — hero and villain alike — finding most of humanity wanting. A massive three-faction war with genuinely cosmic stakes.

Hellfire Gala (2022) 2022 · 4 issues

Krakoa's annual Hellfire Gala is a night of mutant diplomacy, fashion, and spectacle where the new X-Men team is elected by popular vote. The 2022 gala serves as a showcase for Krakoan society at its peak — terraforming Mars into the mutant world of Arakko, unveiling new alliances, and planting seeds for the conflicts to come. Equal parts superhero politics and high-society drama.

X Lives / X Deaths of Wolverine 2022 · 10 issues

Wolverine's consciousness is sent careening through his own past lives to protect Charles Xavier from a time-traveling assassin, while in the present a dark version of Moira MacTaggert enacts her endgame against Krakoa. The twin series weaves through key moments in X-Men history and sets up the Fall of X era by revealing the full scope of Moira's betrayal and Wolverine's central role in mutantkind's fate.

Sins of Sinister 2023 · 11 issues

Mr. Sinister hijacks the Quiet Council and corrupts Krakoa's resurrection protocols, inserting his DNA into every mutant brought back to life. Three interlocking timelines — set 10, 100, and 1,000 years in the future — reveal a nightmarish world where Sinister's influence has consumed mutantkind and threatens to birth a new Dominion. A brilliantly structured alternate-timeline event that doubles as a character study of Sinister's bottomless ambition.

Fall of the House of X / Rise of the Powers of X 2024 · 10 issues

The grand finale of the Krakoan era, told through two interlocking miniseries that mirror the structure of the original House of X / Powers of X. Orchis has conquered Krakoa, scattered the mutants, and turned humanity against them. As the remaining X-Men mount a desperate last stand against Orchis and the Dominion threat, Moira MacTaggert's true endgame is revealed. Across multiple timelines, mutantkind fights for its very right to exist — and the resolution changes the nature of the X-Men universe forever. The Krakoan age ends not with a whimper but with a cosmic reckoning that echoes across every life Moira has ever lived.